WO2021040026A1 - Dispositif d'éclairage - Google Patents

Dispositif d'éclairage Download PDF

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Publication number
WO2021040026A1
WO2021040026A1 PCT/JP2020/032764 JP2020032764W WO2021040026A1 WO 2021040026 A1 WO2021040026 A1 WO 2021040026A1 JP 2020032764 W JP2020032764 W JP 2020032764W WO 2021040026 A1 WO2021040026 A1 WO 2021040026A1
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WO
WIPO (PCT)
Prior art keywords
light
light source
optical element
incident
hole
Prior art date
Application number
PCT/JP2020/032764
Other languages
English (en)
Japanese (ja)
Inventor
元裕 土井
皓介 内田
Original Assignee
佐藤ライト工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 佐藤ライト工業株式会社 filed Critical 佐藤ライト工業株式会社
Priority to JP2021543085A priority Critical patent/JPWO2021040026A1/ja
Publication of WO2021040026A1 publication Critical patent/WO2021040026A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
    • B60Q3/20—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors for lighting specific fittings of passenger or driving compartments; mounted on specific fittings of passenger or driving compartments
    • B60Q3/217—Doors, e.g. door sills; Steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
    • B60Q3/60—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by optical aspects
    • B60Q3/62—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by optical aspects using light guides
    • B60Q3/64—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by optical aspects using light guides for a single lighting device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/237—Light guides characterised by the shape of the light guide rod-shaped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/239—Light guides characterised by the shape of the light guide plate-shaped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/242—Light guides characterised by the emission area
    • F21S43/245—Light guides characterised by the emission area emitting light from one or more of its major surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/08—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using diaphragms containing one or more apertures

Definitions

  • the present invention relates to a lighting device, and particularly to a vehicle lighting device installed at the lower inside of a vehicle door.
  • courtesy lamps have been used as lighting fixtures attached to the lower inside of vehicle doors.
  • the courtesy lamp informs the vehicle behind that the door is open and also serves as a footlight to illuminate the feet of passengers at night.
  • the courtesy lamp irradiates light in the front direction of the lamp (inward direction of the vehicle door).
  • a logo lamp is a lamp that projects an arbitrary logo on the ground or the like.
  • a logo lamp for a vehicle it is used by being incorporated inside a side mirror or a vehicle door.
  • courtesy logo lamps that can project a logo on the feet of passengers have also been devised and put on the market (Patent Document 1).
  • the structure of a general courtesy lamp is often a simple structure that only has a light source and an outer lens. Since it is preferable that the courtesy lamp emits light on the entire lens surface so that it can be easily seen from the rear vehicle, a lens cut or the like is applied to the inner surface of the outer lens in the conventional structure. As a result, the light from the light source can be diffused by the outer lens to cause surface emission.
  • LEDs which are often used as a light source, have strong directivity, so that it may be difficult to realize good surface emission with a conventional structure.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide a lighting device capable of realizing good surface emission with a simple configuration.
  • the lighting device of the present invention includes a light source and an outer lens having a light emitting surface, and diffuses the light from the light source to irradiate the outside world with the diffused light.
  • the light source and the outer lens An optical element arranged so as to correspond to the shape of the light emitting surface is provided between the two, and the optical element includes an incident portion in which at least a part of the light from the light source is incident and the outer lens.
  • the incident portion has an exit portion that emits light toward the light source, and the incident portion is arranged so as to face the light source and is recessed toward the optical axis direction of the light source.
  • the outside world refers to the space outside the lighting device.
  • the optical element has a substantially rectangular plate shape arranged so as to correspond to the shape of the light emitting surface having a substantially rectangular shape, and at the incident portion, in the longitudinal direction of the optical element orthogonal to the optical axis direction of the light source.
  • the optical element is bent so as to expand, and the optical element has a substantially V-shaped groove formed along the optical axis direction of the light source at substantially the center in the longitudinal direction, and is orthogonal to the optical axis direction of the light source. It has at least one of the substantially V-shaped grooves formed along the lateral direction of the optical element, and the light incident from the incident portion is reflected inside the optical element at the bottom surface of the groove. It is a feature.
  • the optical element is characterized in that the incident portion is composed of an inner surface of the recess and an inner surface of the through hole, and the through hole and the recess communicate with each other.
  • the lighting device includes a logo lamp unit that irradiates an arbitrary design in a direction inclined by a predetermined angle with respect to the irradiation direction of the diffused light by using the light of the light source.
  • a design film forming a secondary light source, a deflection element that receives light emitted from the light source and deflects it toward the design film side, and light emitted from the secondary light source are incident on the secondary light source. It has an optical lens having a focal point, the incident portion of the optical element is formed by the inner surface of the through hole, the deflection element is emitted from the light source, and the through hole is formed without being incident on the optical element. It is characterized in that it is arranged so that the passing light is incident.
  • the deflection element is a columnar member, and has an incident portion that incidents light from the light source and a reflective surface that reflects light traveling in a direction substantially parallel to the optical axis of the light source in the irradiation direction of the logo lamp unit. It has an emitting portion that emits the light reflected by the reflecting surface toward the design film, and the incident portion and the emitting portion are connected by the reflecting surface.
  • the incident portion and the emitting portion are columnar or polygonal, and the cross-sectional area of the effective light flux in the emitting portion is larger than the cross-sectional area of the effective light flux in the incident portion.
  • the incident portion of the deflection element is arranged outside the through hole of the optical element, and in the cross section in the optical axis direction, a straight line connecting the light source and the opening edge on the exit side of the through hole and the light.
  • ⁇ a the angle formed by the axes
  • ⁇ b the angle formed by the straight line connecting the light source and the point on the outer periphery of the effective luminous flux in the incident portion of the deflection element and the optical axis
  • the incident portion of the deflection element is arranged inside the through hole of the optical element, and in the cross section in the optical axis direction, a straight line connecting the light source and the opening edge on the exit side of the through hole and the light.
  • ⁇ a the angle formed by the axes
  • ⁇ b the angle formed by the straight line connecting the light source and the point on the outer periphery of the effective luminous flux in the incident portion of the deflection element and the optical axis
  • the design film, the deflection element, and the optical lens are an integrated assembly.
  • the lighting device has a lid member having a protrusion formed between the optical element and the outer lens, and the incident portion of the optical element is formed on the inner surface of the through hole, and the through hole is formed with the above.
  • the lighting device of the present invention is a lighting device that diffuses light from a light source and irradiates the outside world with diffused light, and is arranged between the light source and the outer lens so as to correspond to the shape of a light emitting surface. It has an optical element, and the optical element has an incident portion and an emitting portion, and the incident portion is arranged to face the light source and is formed on the inner surface of a recess recessed in the direction of the optical axis of the light source and the light source.
  • the optical element has a substantially rectangular plate shape arranged so as to correspond to the shape of a substantially rectangular light emitting surface, and is refracted at an incident portion so as to spread in the longitudinal direction of the optical element orthogonal to the optical axis direction of the light source. Therefore, it can be diffused to the longitudinal width of the light emitting surface of the outer lens. Further, the optical element is formed substantially in the center of the longitudinal direction along a substantially V-shaped groove formed along the optical axis direction of the light source and along the lateral direction of the optical element orthogonal to the optical axis direction of the light source.
  • the direction of the light emitted from the optical element can be limited. Efficient surface emission can be realized. Further, the direction of the emitted light emitted from the emitting portion of the optical element changes in various ways, so that the illuminance distribution on the entire surface can be easily made uniform.
  • the lighting device includes a logo lamp unit that uses the light of a light source to irradiate an arbitrary design in a direction inclined by a predetermined angle with respect to the irradiation direction of the diffused light.
  • the logo lamp unit includes a design film and deflection. It has an element and an optical lens, and the incident part of the optical element is formed by the inner surface of the through hole, and the deflection element is emitted from a light source so that light passing through the through hole is incident without being incident on the optical element.
  • the incident portion of the deflection element is arranged outside or inside the through hole of the optical element, and the angle formed by the optical axis and the straight line connecting the light source and the opening edge on the exit side of the through hole in the cross section in the optical axis direction. It was a gamma a, and the line connecting the points on the periphery of the effective light beam at the incident portion of the light source and the deflection device, when the angle between the optical axis and the gamma b, the relation of ⁇ a ⁇ ⁇ b holds, It is possible to prevent the light emitted from the light source from leaking from the gap between the optical element and the deflection element, and it is possible to improve the efficiency of light utilization.
  • the design film, the deflection element, and the optical lens are an integrated assembly, it is possible to prevent deposits such as dust from adhering to the design film, and the film and the optical lens that require precision are assembled. , It is easy to set points for management at the time of assembly.
  • the illuminating device has a lid member having a protrusion formed between the optical element and the outer lens, and is emitted from a light source and incident on the optical element with the protrusion inserted in the through hole of the optical element. Since the light that passes through the through hole is reflected by the surface of the protrusion toward the inner surface of the through hole of the optical element, the direction of the emitted light emitted from the exit portion of the optical element changes in various ways, so that the entire surface is reflected. The illuminance distribution tends to be uniform. In addition, the courtesy logo lamp and the like can be easily switched to the function of the courtesy lamp only.
  • FIG. 1st Embodiment of the lighting apparatus of this invention It is an exploded perspective view of the 1st Embodiment of the lighting apparatus of this invention. It is a figure of the XY plane field of view of the optical element of the illuminating device of FIG. It is a figure which shows the modification of the optical element of the lighting apparatus of FIG. It is a figure which shows the modification of the optical element of the lighting apparatus of FIG. It is a figure which shows the modification of the optical element of the lighting apparatus of FIG. It is sectional drawing of the YZ plane of the lighting apparatus of FIG. It is explanatory drawing of the structure of a deflection element. It is explanatory drawing of the positional relationship of an optical element and a deflection element.
  • the lighting device 1 shown in FIG. 1 is a lighting device that irradiates the outside world with diffused light from the light emitting surface 3a and irradiates an arbitrary design in a direction inclined by a predetermined angle with respect to the irradiation direction of the diffused light.
  • the lighting device 1 is a courtesy logo lamp in which the function of a logo lamp is added to the courtesy lamp.
  • the lighting device 1 is mounted on the lower inside of the vehicle door, for example.
  • the direction parallel to the optical axis of the light source is the Z-axis direction
  • the directions orthogonal to the optical axis of the light source are the X-axis direction and the Y-axis direction.
  • the Z-axis direction is also a direction substantially parallel to the irradiation direction of the diffused light.
  • the lighting device 1 of FIG. 1 includes an LED 5 as a light source, a substantially flat optical element 6, and a logo lamp unit 12 in the space of the housing 2, and an outer lens 3 is arranged in the opening of the housing 2. ing.
  • the outer surface of the outer lens 3 is exposed to the outside world.
  • a substantially rectangular light emitting surface 3a is formed on the outer lens 3, and the light emitting surface 3a emits light on the entire surface, so that the rear vehicle can easily recognize the opening of the vehicle door.
  • an optical element having a predetermined structure between the light source and the outer lens the light from the light source can reach the longitudinal width of the light emitting surface of the outer lens even if the light source has high directivity. It can be diffused.
  • the LED 5 is provided on the substrate 4.
  • a monochromatic LED such as blue, red, and green, or an RGB type LED including a blue LED, a red LED, and a green LED can be used.
  • An LD or a light bulb may be used instead of the LED.
  • the optical element 6 is a substantially rectangular plate-shaped member, and is formed of a transparent material such as polycarbonate, acrylic, or glass.
  • the optical element 6 is arranged so that the substantially rectangular XY plane is orthogonal to the optical axis of the LED 5 and the direction corresponds to the substantially rectangular shape of the light emitting surface 3a.
  • the substantially rectangle includes a trapezoid similar to a rectangle and a rectangle with rounded corners (for example, an ellipse) in addition to the rectangle.
  • the optical element 6 has an incident portion in which at least a part of the light from the LED 5 is incident, and an emitting portion that emits light toward the light emitting surface 3a of the outer lens 3.
  • the emitting portion is composed of an end surface 6c on the outer lens 3 side.
  • a through hole 6a is formed at substantially the center of the XY plane of the optical element 6 so as to face the LED 5 and penetrate coaxially with the optical axis of the LED 5.
  • substantially V-shaped grooves 6b and 6b formed along the optical axis direction of the LED 5 are formed at both ends in the lateral direction at substantially the center of the optical element 6 in the longitudinal direction.
  • FIG. 2 shows an explanatory diagram of the path of light incident on the optical element.
  • FIG. 2A shows an XZ plane field of view
  • FIG. 2B shows an XY plane field of view.
  • the longitudinal direction, the lateral direction, and the thickness direction of the optical element 6 correspond to the X-axis direction, the Y-axis direction, and the Z-axis direction, respectively.
  • the incident portion of the optical element 6 is formed by the inner surface of the through hole 6a.
  • a part of the light emitted from the LED 5 is incident on the optical element 6 from the inner surface of the through hole 6a, and the rest travels in the Z-axis direction so as to pass through the through hole 6a.
  • the light incident on the optical element 6 is refracted on the inner surface of the through hole 6a, travels so as to spread in the longitudinal direction of the optical element 6, and is emitted from the exit surface 6c toward the outer lens side. Further, as shown in FIG. 2B, a part of the light incident on the optical element 6 (particularly the light traveling in the lateral direction) is reflected by the bottom surfaces of the grooves 6b and 6b in the longitudinal direction of the optical element 6. It proceeds so as to spread to, and is emitted from the exit surface 6c.
  • the light from the LED 5 can be diffused to the longitudinal width of the light emitting surface 3a of the outer lens 3. Further, by providing a reflecting surface like a substantially V-shaped groove, the direction of the emitted light emitted from the emitting surface 6c of the optical element 6 changes variously, and the illuminance distribution of the entire light emitting surface 3a is made uniform. It will be easier.
  • FIG. 3 shows a modified example of the optical element.
  • FIG. 3A shows an XZ plane field of view
  • FIG. 3B shows an XY plane field of view seen from the outer lens side.
  • the optical element 13 is formed with a substantially V-shaped groove 13b formed in a direction orthogonal to the optical axis direction of the LED 5 and along the lateral direction. As shown in FIG. 3A, a part of the light emitted from the LED 5 is incident on the optical element 13 from the inner surface of the through hole 13a, and the rest travels in the Z-axis direction so as to pass through the through hole 13a.
  • the light incident on the optical element 13 is refracted on the inner surface of the through hole 13a, travels so as to spread in the longitudinal direction of the optical element 13, and is emitted from the exit surface 13c toward the outer lens side. Further, a part of the light incident on the optical element 13 is reflected inside the optical element 13 by the bottom surface of the groove 13b, and the reflected light is reflected by the inner wall surface on the LED5 side and emitted from the exit surface 13c.
  • the groove 13b is formed substantially in the center of the end surface on the outer lens 3 side in the longitudinal direction. In the form of FIG. 3, the groove 13b is formed from one end to the other end in the lateral direction, except for the portion of the through hole 13a.
  • FIG. 4 shows another modified example of the optical element.
  • FIG. 4 shows the YZ plane field of view of the optical element 14.
  • the optical element 14 has a structure in which the corners on both sides in the lateral direction on the LED5 side are obliquely cut out.
  • a part of the light emitted from the LED 5 enters the optical element 14 from the inner surface of the through hole 14a, and the rest travels in the Z-axis direction so as to pass through the through hole 14a.
  • the light incident on the optical element 14 is refracted on the inner surface of the through hole 14a, then reflected by the notch surface 14b, and is emitted from the exit surface 14c toward the outer lens side.
  • the light rays traveling in the Y-axis direction are reflected, and the light rays traveling in the Z-axis direction are refracted or reflected.
  • the configurations of FIGS. 2 to 4 can be combined as appropriate.
  • the shape of the through hole is a columnar shape having a constant hole diameter, but the shape is not limited to this, and may be a columnar shape whose diameter is expanded or reduced along the optical axis direction. It may be an elliptical column or a polygonal column. As the polygonal column, a regular square column or a regular hexagonal column can be adopted. Further, the shape of the inner surface of the through hole in the YZ plane cross section and the XZ plane cross section may be a straight line or a curved line. Further, a blasting surface or the like can be provided on the incident side end surface or the exit side end surface of the optical element to give a diffusion shape.
  • FIGS. 2 to 4 show an example of a light guide body that propagates while repeating reflection after receiving light as an optical element
  • the optical element may be a refracting body that does not repeat reflection like a light guide body.
  • FIG. 5 shows an example in which the optical element is a refracting body.
  • 5 (a) is a perspective view of the optical element from the emitting portion side
  • FIG. 5 (b) is a perspective view of the optical element from the incident portion side
  • FIG. 5 (c) is a cross-sectional view in the XZ plane. is there.
  • a recess 15b is formed at substantially the center of the end face of the optical element 15 on the light source side in the longitudinal direction, which is arranged to face the light source and is recessed toward the optical axis of the light source.
  • the recess 15b is a dome-shaped recess, and is formed so that the depth of the recess becomes deeper from both edges of the recess 15b toward the center in the lateral direction of the optical element 15. Further, in the longitudinal direction of the optical element 15, the recesses are formed so that the depth of the recesses becomes deeper from both edges of the recesses 15b toward the center (see FIG. 5C).
  • a through hole 15a is formed in substantially the center of the XY plane of the optical element 15 to communicate the recess 15b and the end surface on the deflection element side.
  • the through hole 15a is arranged to face the light source and is formed coaxially with the optical axis of the light source.
  • part of the light emitted from the light source enters the optical element 15 from the inner surface of the recess 15b and the inner surface of the through hole 15a, and the rest travels in the Z-axis direction so as to pass through the through hole 15a.
  • the light incident on the optical element 15 is refracted on the inner surface of the recess 15b and the inner surface of the through hole 15a, and travels so as to spread in the longitudinal direction of the optical element 15. Further, the light emitted from the optical element 15 is refracted by the exit surface 15c and emitted toward the outer lens side.
  • the lighting device 1 includes a logo lamp unit 12 in addition to the courtesy lamp configuration described above.
  • the design film 8 forming the secondary light source
  • the deflection element 7 in which the light emitted from the LED 5 is incident and deflected to the design film 8 side, and the light emitted from the secondary light source are incident. It has a first optical lens 9 having a focus on a secondary light source, an aperture aperture 10, and a second optical lens 11 mounted on an outer lens 3.
  • the design film 8 has an opening that serves as a field diaphragm.
  • the design film 8 is composed of a light-shielding portion and a non-light-shielding portion, and the difference in the amount of light transmitted through the design film 8 appears as a pattern.
  • a known design film 8 can be used.
  • the first optical lens 9 is a lens that projects an irradiation image such as a logo on an irradiated surface, and has a focal point on a secondary light source.
  • the first optical lens 9 is formed of a transparent material such as polycarbonate, acrylic, or glass. In the illuminating device 1, only one optical lens may be used, but as shown in FIG. 1, it may be used in combination with the second optical lens 11.
  • the second optical lens 11 is also formed of a transparent material such as polycarbonate, acrylic, or glass.
  • the conventional courtesy logo lamp includes a substrate and a light source for the courtesy lamp and a substrate and a light source for the logo lamp. That is, since the irradiation direction of the courtesy lamp and the irradiation direction of the logo lamp are different, the functions of the two lamps are provided by using two substrates and two light sources. Therefore, the number of parts is large, the assembly man-hours are increased, and the cost tends to be high.
  • the lighting device 1 of FIG. 1 efficiently integrates the functions of two lamps having different irradiation directions, and realizes the configuration of a courtesy logo lamp on one substrate and with the same light source.
  • FIG. 6 shows a cross-sectional view of the YZ plane of the lighting device of the present invention.
  • the deflecting element 7 is arranged at a position where the incident portion 7a faces the LED 5 with a through hole 6a of the optical element 6 interposed therebetween.
  • the light incident from the LED 5 and passing through the through hole 6a without being incident on the optical element 6 is incident on the deflection element 7.
  • the design film 8, the deflection element 7, and the optical lens 9 are preferably an integrated assembly. By assembling, it is possible to prevent dust and the like from adhering to the design film 8, and since the film and the optical lens that require precision are assembled, it is easy to place a point on management at the time of assembly.
  • a means for forming the assembly for example, ultrasonic welding, heat caulking, or using a hook is used.
  • the assembly is attached to the outer lens 3.
  • the optical element 6 may be integrated with the deflection element 7 or may be a separate body. When they are separated, for example, by using the optical element 6 as a phosphor or by coloring the optical element 6, the color of the logo lamp and the courtesy lamp can be separated. For example, the lighting of the logo lamp can be set to cool white, and the lighting of the courtesy lamp can be set to warm white.
  • FIG. 7 shows a schematic view of the logo lamp unit 12 cut along the XZ plane including the optical axis.
  • the optical element 6 and the aperture diaphragm 10 are omitted.
  • Deflection element 7 is a columnar member having one end portion is bent, and the incident portion 7a incident light from LED5, the light traveling in the optical axis O p substantially parallel to the direction of LED5 logo lamp unit 12 It has a reflecting surface 7b that reflects in the irradiation direction, and an emitting portion 7c that emits the reflected light from the reflecting surface 7b toward the design film 8.
  • the incident portion 7a and the exit portion 7c are connected by a reflecting surface 7b.
  • Deflection element 7, the center axis of the cylindrical entrance portion 7a is disposed so as to coincide with the optical axis O p.
  • the end surface of the incident portion 7a facing the exit surface of the LED 5 is the incident surface, and the incident surface is formed of a curved surface or a flat surface.
  • the incident surface has a function of making the light incident from the LED 5 substantially parallel light.
  • substantially parallel includes not only a relationship in which they are parallel to each other, but also a relationship in which they deviate from the parallel relationship to some extent.
  • the reflecting surface 7b is from the optical axis O p, an inclined plane along a straight line inclined angle theta b toward the polarization direction with respect to the optical axis O p.
  • the angle ⁇ b is not particularly limited, but is preferably an angle of 1/3 to 2/3 of the angle ⁇ a formed by the optical axis Op and the deflection axis O q, and is preferably an angle of 1/2. More preferred.
  • the shape of the reflecting surface 7b viewed from the direction of the white arrow is elliptical.
  • the reflecting surface 7b may be a total reflection surface, a reflection surface formed by mirror deposition, or the like. Further, the shape of the reflecting surface 7b is not limited to the inclined plane, and may be formed by, for example, an inclined curved surface that is convex outward.
  • the relationship between the distance L a from the intersection P to the incident surface is preferably a L a ⁇ L b. That is, it is preferable that the shape of the incident surface is not chipped by the reflecting surface 7b. More preferably L a> L b.
  • the end surface of the exit portion 7c facing the design film 8 is the exit surface, and the exit surface is formed of a curved surface or a flat surface.
  • the emitting surface has a function of emitting the light reflected by the reflecting surface 7b toward the design film 8.
  • the central axis of the cylindrical exit portion 7c coincides with the deflection axis Oq.
  • the cross-sectional area of the effective light flux at the emitting portion 7c is preferably equal to or larger than the cross-sectional area of the effective light flux at the incident portion 7a, and more preferably larger than the cross-sectional area of the effective light flux at the incident portion 7a.
  • the cross-sectional area of the effective luminous flux of the emitting portion 7c is the area of the cross section of the effective luminous flux cut at the plane orthogonal to the deflection axis Oq (circular area in FIG. 7).
  • Sectional area of the effective light beam incident portion 7a is a cross-sectional area of the effective light beam taken along a plane perpendicular to the optical axis O p (circle area in Figure 7).
  • the shapes of the incident portion 7a and the outgoing portion 7c are not limited to the columnar shape, and may be a polygonal columnar shape.
  • the polygonal prism can be a regular tetrahedron or a regular hexagonal prism.
  • the light incident from the incident portion is reflected and propagated on a plurality of side wall surfaces constituting the polygon, so that there is an advantage that the distribution on the exit surface can be made uniform.
  • the light emitted from the second optical lens 11 is projected onto an irradiated surface such as the ground.
  • the irradiation diameter of the irradiation area IA of the projection destination is ID and the illuminance required in the irradiation area IA is I
  • the amount of light incident on the effective luminous flux diameter FD preferably satisfies the following formula. Amount of light incident on the effective luminous flux diameter FD> I ⁇ ⁇ (ID / 2) 2
  • FIGS. 8 and 9 show schematic cuts cut in the XZ plane including the optical axis.
  • the thickness of the optical element is, for example, 2 to 15 mm.
  • FIG. 8 shows a case where the incident portion 7a of the deflection element 7 is arranged outside the through hole 6a of the optical element 6, that is, a case where the incident portion 7a is not inserted into the through hole 6a.
  • the distance D a from the LED 5 to the effective luminous flux diameter FD of the incident portion 7 a is larger than the distance D b from the LED 5 to the exit side opening of the optical element 6 (D a > D b ).
  • the angle formed by the straight line connecting the LED 5 and the opening edge R on the exit side of the through hole 6a and the optical axis Op is ⁇ a
  • the effective luminous flux in the incident portion 7 a of the LED 5 and the deflection element 7 is defined as ⁇ a.
  • a straight line connecting a point S on the outer circumference when the angle between the optical axis O p was gamma b, it is preferable that the relation ⁇ a ⁇ ⁇ b holds.
  • FIG. 9 shows a case where the incident portion 7a of the deflection element 7 is arranged inside the through hole 6a of the optical element 6, that is, a case where the incident portion 7a is inserted into the through hole 6a.
  • the distance D a from the LED 5 to the effective luminous flux diameter FD of the incident portion 7 a is smaller than the distance D b from the LED 5 to the exit side opening of the optical element 6 (D a ⁇ D b ).
  • the relationship between the angle ⁇ a and the angle ⁇ b is preferably ⁇ a ⁇ ⁇ b.
  • the relationship between the angle ⁇ a and the angle ⁇ b is preferably ⁇ a ⁇ ⁇ b.
  • the lighting device 21 of FIG. 10 has only the function of a courtesy lamp.
  • the lighting device 21 does not have a logo lamp unit, but instead has a lid member 27.
  • the lid member 27 is arranged between the optical element 26 and the outer lens 23.
  • a through hole 26a is formed at substantially the center of the XY plane of the optical element 26 so as to face the LED 25 and penetrate coaxially with the optical axis of the LED 25.
  • the lid member 27 has a pillar portion 27a and a protrusion 27b formed on the end surface of the pillar portion 27a on the light source side.
  • the lid member 27 is attached so that the pillar portion 27a is arranged substantially in the center of the optical element 26 in the longitudinal direction along the lateral direction thereof, and the protrusion 27b closes the through hole 26a.
  • FIG. 11 shows a YZ plane field of view of the optical element 26 and the like.
  • the protrusion 27b of the lid member 27 is inserted into the through hole 26a of the optical element 26.
  • the protrusion 27b has a conical shape, and the central axis of the cone coincides with the optical axis of the LED 25.
  • the protrusion 27b is not limited to a conical shape, and may be a polygonal pyramid such as a regular square pyramid.
  • the optical element 26 has a structure in which the corners on both sides in the lateral direction on the LED 25 side are obliquely cut out.
  • a part of the light emitted from the LED 25 directly enters the optical element 26 from the inner surface of the through hole 26a, the rest is reflected on the surface of the protrusion 27b, and then the optical element 26 is reflected from the inner surface of the through hole 26a. Incident inside.
  • the light emitted from the LED 25 and passing through the through hole without being incident on the optical element 26 is transmitted to the inner surface of the through hole 26a of the optical element 26 on the surface of the protrusion 27b. It can be directed and reflected.
  • the light of the LED 25 is appropriately diffused, and the illuminance distribution on the entire surface is likely to be uniform.
  • the lid member 27 is made of a material (resin material, metal material, etc.) having a reflectance of 10% or more.
  • the protrusion height H of the protrusion 27b is equal to or less than the distance D b from the LED 25 to the exit side opening of the optical element 26 (H ⁇ D b ).
  • an optical element having a through hole formed it is possible to easily switch between a courtesy logo lamp and a courtesy lamp. That is, when used as a courtesy lamp, the lid member 27 is attached, and when used as a courtesy logo lamp, the function of the lamp can be easily switched by attaching the deflection element, the design film, and the assembly of the optical element. ..
  • FIG. 12 shows a modified example of the lighting device of the second embodiment.
  • the lighting device of FIG. 12 has the same configuration as the lighting device of FIG. 10 except that it has no lid member and the shape of the optical element is different.
  • a through hole is not formed on the end surface of the optical element 36 on the exit side. Therefore, unlike the lighting device of FIG. 10, a lid member for closing the through hole is not required.
  • the optical element 36 is a refracting body.
  • FIG. 13 shows a cross-sectional view of the YZ plane of the lighting device 31, and FIG. 14 shows a perspective view of the optical element 36 and the like.
  • a recess 36b which is arranged to face the LED 35 and is recessed in the optical axis direction of the LED 35 is formed at substantially the center of the end face of the optical element 36 on the LED 35 side in the longitudinal direction.
  • the recess 36b is a dome-shaped recess and is formed so as to cover the exit surface of the LED 35.
  • the optical element 36 is formed so that the depth of the concave portion becomes deeper from both edges of the concave portion 36b toward the center in the lateral direction. Further, in the longitudinal direction of the optical element 36, the recesses are formed so that the depth of the recesses becomes deeper from both edges of the recesses 36b toward the center (see FIG. 14C).
  • the light emitted from the light source is incident on the optical element 36 from the inner surface of the recess 36b.
  • the light incident on the optical element 36 is refracted on the inner surface of the recess 36b and travels so as to spread in the longitudinal direction of the optical element 36.
  • the light emitted from the optical element 36 is refracted by the exit surface 36a and emitted toward the outer lens 33 side. Even with this configuration, highly directional light such as an LED can be diffused to the longitudinal width of the light emitting surface 33a of the outer lens 33.
  • the lighting device of the present invention is not limited to these configurations.
  • a substantially rectangular plate-shaped member having a substantially rectangular XY plane is used for the optical element, but the XY plane may correspond to the shape of the light emitting surface of the outer lens.
  • the optical element may have a square XY plane.
  • a circular plate-shaped member may be used.
  • the lighting device of the present invention can realize good surface light emission with a simple configuration, it is suitable for a lighting device that requires surface light emission, and is particularly suitable for a courtesy lamp. Further, the lighting device of the present invention is particularly suitable for a courtesy logo lamp or the like because it can have two irradiation functions having different irradiation directions by using the same light source.
  • Lighting device 2 Housing 3 Outer lens 4 Board 5 LED (light source) 6
  • Optical element 7 Deflection element 8
  • Design film 9 1st optical lens 10
  • Aperture aperture 11 2nd optical lens 12
  • Logo lamp unit 13 Optical element 14
  • Optical element 15 Optical element 21
  • Lighting device 22 Housing 23
  • Outer lens 24 Substrate 25
  • LED (light source) 26
  • Optical element 27 Lid member 31
  • Lighting device 32 Housing 33 Outer lens 34 Board 35 LED (light source) 36 optics

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Led Device Packages (AREA)

Abstract

L'invention concerne un dispositif d'éclairage permettant d'obtenir une excellente émission en surface avec une configuration simple. Le dispositif d'éclairage (1) comprend une DEL (5) et une lentille externe (3) ayant une surface d'émission de lumière sensiblement rectangulaire (3a). Le dispositif d'éclairage, qui diffuse la lumière à partir de la DEL (5) et irradie l'extérieur avec la lumière diffusée, présente un élément optique en forme de plaque sensiblement rectangulaire (6) disposé entre la DEL (5) et la lentille externe (3) pour correspondre à la forme de la surface d'émission de lumière (3a). L'élément optique (6) a une partie incidente sur laquelle au moins une partie de la lumière provenant de la DEL (5) est incidente et une partie d'émission qui émet de la lumière vers la lentille externe (3). La partie incidente est conçue par une surface interne d'un trou traversant (6a) qui est disposé de façon à faire face à la DEL (5) et est pénétré de manière coaxiale par rapport à un axe optique de la DEL (5). La lumière incidente à partir de la partie incidente est réfractée sur la surface interne du trou traversant (6a) pour être diffusée dans la direction longitudinale de l'élément optique (6) perpendiculairement à la direction de l'axe optique de la DEL (5).
PCT/JP2020/032764 2019-08-28 2020-08-28 Dispositif d'éclairage WO2021040026A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
JP2019155445 2019-08-28
JP2019-155445 2019-08-28

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012009472A (ja) * 2010-06-22 2012-01-12 Konica Minolta Opto Inc 発光装置
JP2014216259A (ja) * 2013-04-26 2014-11-17 株式会社東芝 照明装置および広配光レンズ
JP2018156731A (ja) * 2017-03-15 2018-10-04 株式会社エンプラス 照明装置および光束制御部材
JP2018171941A (ja) * 2017-03-31 2018-11-08 株式会社村上開明堂 カーテシランプおよびカーテシロゴランプ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012009472A (ja) * 2010-06-22 2012-01-12 Konica Minolta Opto Inc 発光装置
JP2014216259A (ja) * 2013-04-26 2014-11-17 株式会社東芝 照明装置および広配光レンズ
JP2018156731A (ja) * 2017-03-15 2018-10-04 株式会社エンプラス 照明装置および光束制御部材
JP2018171941A (ja) * 2017-03-31 2018-11-08 株式会社村上開明堂 カーテシランプおよびカーテシロゴランプ

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